The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 09, 1999
Filed:
Oct. 09, 1997
Masaaki Furuhashi, Tokyo, JP;
Ando Electric Co., Ltd., Tokyo, JP;
Abstract
The object of the present invention is to offer an optical pulse tester capable of accurately measuring waveforms of light returned from measured optical fibers even if the waveforms contain only discontinuous waveforms. An optical receiver 5 receives light returned from a measured optical fiber 10. An amplifying section 6 amplifies the level of the received light. A digital processing section 7 logarithmically converts the amplified received light level. A S/N ratio comparing means 11 compares the logarithmically converted value with a designated S/N ratio. A data storage means 12 stores received light levels having logarithmically converted values better than the designated S/N ratio, the position of the source of the returned light, and the designated gain value of the amplifying section 6. Thereafter, the procedure from the amplifying section 6 to the data storage means 12 is repeated while sequentially raising the gain of the amplifying section 12. Finally, a display section 8 corrects the level of the received light stored in the data storage means 12 based on the corresponding designated gain values which have been stored, and the data are displayed by joining them together in accordance with their corresponding positions which have been stored.